[OAB 40,76] Jupiter and Saturn give off a good deal more heat than they absorb from the Sun, therefore there must be some additional source of heat within these two planets. The primary solution to this problem is that, unlike the Earth (see Cooling of the Earth, above), Jupiter and Saturn are so large that they have not had time to completely get rid of the heat produced by gravitational formation. Gravitational heat and radioactive decay together account for very nearly all of the heat given off by Jupiter, and most of the heat given off by Saturn. It is thought that any remaining discrepency is explained by helium rainout. Saturn's lower temperatures, along with the relative lack of helium in its atmosphere, support the theory that helium rainout has been more important in Saturn than Jupiter. Furthermore, even if the aforementioned explanations are not sufficient to account for Jupiter and Saturn's heat, we are simply left with the harmless Unexplained Mystery Fallacy.